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JOSIAH' KIRBYA, 0F CINCINNATI, OKHIO. Leen-S Param No. 72,505, atea-Dammen 1867.

IMPROVEMENT 1N BUNGLG'UTTBR.

TO-LL WHOM IT MAY CONCERN:

Be it known that I, JOSIAH KIRBY, ofthe city of Cincinnathin the county of Hamilton, and State of Ohio, have invented a new anduscful Improvement in Machine for Cutting Bung-Blanks and I-do hereby declare the following to be a full, clear, and exact d escription thereof.

In the machines heretofore in use .for cutting bung-blanks, a fish-mouth chisel has commonly been used, which, after cutting -the blank, cuts against and into aI cutting-board, so'called. The cutting-edge of the chisel lbeing uneven, some parts of it must pass through the board from which the blank is cut, and into the cutting'- board, before the remainder of the chisel has done its work; consequently the cutting-board soon becomes. chipped out on its surface, has frequently to be renewed, and, what is of more importance, after it is thus v chipped away and become imperfect, the chisel ceases to cut a clean, perfect blank, and leaves fins or frayed edges on the side of the blank last cut. To obviate this and other difficulties, I have vdevised en improved machine for cutting bungblanks, the peculiar features of which are l First, that each bung is cut by a {ish-mouthed chisel from'a separate square block of wood, of the same diameter as the bung, thus saving material, and lessening the strain on the machine.' i

Second, that the bung-blocks are fed into the machine exactly in line with the chisel, by means of tho feed-bar, and the guides and spring around the mouth of the chisel.

Third, that the parts of my machine are so arranged that the chisel finishes one blank and partly cuts another at each operation, instead of cutting a. single blank at each stroke. This enable me to accomplish the next feature, which is,

Fourth, that the block fed into the machine at each stroke serves as acutting-board for the block already partly cut and on the chisel, thus giving a clean, smooth surface for the chisel to cut against, and securing the edges of the blank from fraying, and the edge of the chisel from injury y Fifth, that by simply raising a hinged bar, the feeding of blanks is .stopped without arresting the motion of the machine.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and mode of operation, referring for .that purpose to the accompanying drawing, making a part of this specication, in which- Figure 1 is a front elevation of my improved machine.

Figure 2 is a section formed by a vertical plane passing through the axis of the chisel and plungei-,and parallel, or nearly so, to the front of the machine, as shownin fig. 1 and vFigure 3 is a rear view of one of the cams employed.

Like letters of reference in the diiferent figures indicate like parts in each.

On thc top or at other convenient part of any suitable framework A is carried an axle, a, to which the motion required to operate the machine-is communicated by gearing ofany` known form. The axle a carries a. ily-wheel, B, and a cam, which latter plays, as it revolves, against-a friction-roller, in the upper end of the plunger c. This latter carries in its lower end a. head, c', of any desi'rableyform. C is a feed-box or trough standing vertically, or nearly so, of square cross-section, into which are fed bung-blocked, cutout with asqua-re face, equal in width and length to the diameter of the bung-blank to be cut, and of any desirable thickness. Directly under the plunger-head c', and at a distance from it equal or about equal to twice the thickness of cach hung-block or disk d, is a stationary fish-mouthed circular chisel, D. Aguide and guard-plate, E, securely attached to the frame A, extends across under the open lower end of the trough orfeed-box C, and just above the mouth of the chisel D, being cut away, however, just at this point, as at e, fig. 1, so as to leave an opening through which the bungeblocks cZ may reach the mouth of the chisel D, as yet to be described.

The cam b, by a crank-shaft,f, attached to it outside its centre of motion, a vibratory shaft, f', pivoted at "g, connecting-rods h, and reciprocating shaft 7L', pivoted at g', operates a slide, t', which moves forward and back ou the guide-plate E, and under the lower end of the feed-box C, carrying with each forward stroke one of the bung-blocks d forward under the plunger-head c', and over the mouth' of the chisel D.' Here it is held exactly inits required: place by the projections o, and in front bythe springs o. Tivo blocks, d, being thus brought into position, a downward stroke of the plunger c forces the lower block into the mouth of the chisel D, (it being of a sh-mouth shape,) thus forming the circular blank d. As the bit ofthe chisel D must all eutV entirely through the block, the projecting parts will enter the next block above, which thus becomes a cuttingboard to the block already inplace.; In this way, 'I entirely-dispense with the ordinary cutting-board, save the waste caused thereby, eut the bungblanks with a clean,- perfect cut,discharging them successively from the lower open end of the chisel D, without fins, or ragged or frayed edges, and ready to be pressed or otherwisev prepared for use.

-As anotheriadvantage, I effect a saving in the amount of material required to make a certain number of blanks.. With the machines ordinarily used, the material is eut into strips' of width equal to the diameter of the desired blank. These strips are cut or scarl'ed -across and nearly through, at intervals a little in excess of' such diameter, which excess it has been found necessary to allow in order to provide for inaccuracies of feedinfr.l This excess, if the machine be run rapidly, amounts to about fifteen per cent. of the material used, which per cent. I entirely save in this machine, since here the feeding is exact, cvenwith the most rapid motiom In order to secure the return or upward stroke of the plunger e, I hollow out the rear face of the earn I1, as shown at fig. 3, so as to leave a projecting rim, n, around its edge. On the inner face of this rim plays a friction-roller, n', which is pivotod to the upper end ofthe plunger c, which latter extends upward and back of thecam b for that purpose. In such case, of course, the plunger c is properly shouldered or notchedy to receive the frictionfroller Zw. In order to be able to start and stop the feed instantly, without otherwise interrupting the motion ofthe machine, I slit the slide z' towards its rear end, and in the slotpivot a hinged bar, m, leaving, however, between its forward end and the end ofthe slot, an aperture, s, in which the upper end ofthe reciprocating shaft 7L plays, in order to give the slide its proper motions. Then when the hinged bar m is raised, as shown `in dottedl lines in lig. 2, the reciprocating arm 7i plays back and forth in the slot thus left open, and to start` the feed-movement again, the hinged bnr m need only be dropped back to its place. In order to regulate the point of throw of the slide z', I make the connecting-rods h adjustable by making them double, and slotting and lapping more or less their inner ends, as at s. To give a longer or shorter throw to the slide I adjust: the connecting-rod 7L at higher or lower points on the reciprocating shaft li.

Although in my machine, as described, the cutting-chisel is stationary, and placed below the pressing plunger, yet this relative arrangement and motion of the parts may be changed by attaching the cutting-chisel to a hollow plunger, and making the bed-plate ofthe machine solid. The bungs passing up through the cylindrical cavity of the cutter, and the motion of the chisel so arranged as to finish one blank and enter a second blank so far that at its upward stroke it will carry this second block up with it, and permit another block to be fed in below. vThe second block then becomes a cutting-board for the first, the` third for the second, and so on for each stroke ofthe cutter or chisel. l

The advantages I claim are, saving of material, both in cutting-board and bung-block, greater accuracy of' feed, and the production of a more perfect bung-blank. v

Having described my improvement, what I claim as my invention, and desireto secure by Letters Patent, is-- 1. The chisel or cutter D, with cylindrical cavity, in combination with the plunger c, and feeding-bar z', c onstructed and arranged substantially as described, for the purpose of cutting bung-blanks from separate square blocks of wood.

2. The combination of feeding slide-bar z', feed-box C, guides o o, and spring o', for feeding successively one of a series or pile of bung-blocks forward in exact line with the cutting-edge ofthe chisel of a bung-machine, operating substantially as described.

3. The cutter D, feeding slide-bar z', and plunger @,so arranged relatively to each other, as that the cutter or chisel shall, when cuttng,have at least two blocks or blanks in line with its cutting-edge, and that, at each stroke of the machine, the cutter shall finish cutting one block or blank, and enter and partly cut a second blank, instead of cutting a single blank at each stroke, substantially as and for the'vpurpose hereinbeferedescribed. Y

4. The cutter and feeding-dcvice of a bung-cutting machine, arranged, substantially as hereinbc'ore described, as that each block as it is fed into the machine shall serve as a cutting-board for tlie next preceding block. l

5. The use of the hinged bar min the slot of the sliding feed-bar z', in combination with the vibrating shaft L, whereby, by raising the bar m, the motion of the feed-bar z' is suddenly arrested, without stepping the motion of the other parts of the machine.

In testimony whereof, I, the said JOSIAII KIRBY, have hereunto set my hand. l .TOSIAll KIRBY..

Witnesses:

A. S. NICHOLSON, Gnc. H. Gnnrs'rr. 

